Redesign dlopen() locks to be recursive per thread
picked from
https://github.com/android/platform_bionic/commit/f9c5afb1f9d8e615ab98774a10bbf117962db66d
Prevent deadlock when using fork

When forking of a new process in bionic, it is critical that it
does not allocate any memory according to the comment in
java_lang_ProcessManager.c:
"Note: We cannot malloc() or free() after this point!
A no-longer-running thread may be holding on to the heap lock, and
an attempt to malloc() or free() would result in deadlock."
However, as fork is using standard lib calls when tracing it a bit,
they might allocate memory, and thus causing the deadlock.
This is a rewrite so that the function cpuacct_add, that fork calls,
will use system calls instead of standard lib calls.

Signed-off-by: christian bejram <christian.bejram@stericsson.com>

original identificator of the change is Iff22ea6b424ce9f9bf0ac8e9c76593f689e0cc86

picked from
https://android-review.googlesource.com/#/c/21627/
libm: cherry-pick one patch from freebsd to fix logb() denormals issue

from http://svnweb.freebsd.org/base?view=revision&revision=176101
"
Oops, fix the fix in rev.1.10.  logb() and logbf() were broken on
 denormals, and logb() remained broken after 1.10 because the fix for
 logbf() was incompletely translated.

Convert to __FBSDID().
"

Change-Id: I54f33648db7c421b06eee1ea8e63c57a179fae0d
Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
bionic: Fix wrong prototype of system call getresuid/getresgid

In bionic/libc/SYSCALLS.TXT, the prototypes of system call
getresuid/getresgid are incorrect.

According to man page, they should be:
    int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
    int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);

Change-Id: I676098868bb05a9e1fe45419b234cf397626fdad
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Bionic: Fix wrong prototype of system call clock_nanosleep

In bionic/libc/SYSCALLS.TXT, the prototype of system call
clock_nanosleep is incorrect.

According to man page:
int clock_nanosleep(clockid_t clock_id, int flags,
                    const struct timespec *request,
                    struct timespec *remain);

Change-Id: Ic44c6db3d632293aa17998035554eacd664c2d57
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Remove expired dns cache entries before removing oldest

A suggestion how to make a smarter delete function when the cache
is full. First look through the entire cache and remove all entries
which have expired. If none use the old solution and just remove
the last entry in the MRU list.

Change-Id: I5f997ab35290a55dc6e1ddf37d725759edf83d36
Add missing va_end() to prevent stack corruptions

Added va_end() for copied variable arguments lists
in __vfprintf() and __find_arguments().
This is by C standard.
Important for systems which pass arguments in registers.

Change-Id: I7ac42beaa6645bfe856c18132253352dae29ea37
bionic: fix integer overflows in chk_malloc(), leak_malloc(), and leak_memalign()

The allocation size in chk_malloc(), leak_malloc(), and leak_memalign()
functions may be rounded up to a small value, leading to buffer overflows.
The code only runs in debugging mode.

This patch complements commit 6f04a0f4 (CVE-2009-0607).

Change-Id: Id899bcd2bcd2ea2205e5753c433390710032dc83
Signed-off-by: Xi Wang <xi.wang@gmail.com>
bionic: fix NULL parameter failure in getcwd()

LTP: getcwd01 failed in LTP

Need to check getcwd parameters, otherwise it will lead to
posix test case to fail.

Change-Id: Ieb673b6dd4ca6481da81c5339dbf7ec0a463f263
Signed-off-by: Jin Wei <wei.a.jin@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
pthread: Invalidate stale stack pointers on pthread_exit()

A call to pthread_key_delete() after pthread_exit() have unmapped the stack of a thread
but before the ongoing pthread_join() have finished executing will result in an access
to unmapped memory.
Avoid this by invalidating the stack_base and tls pointers during pthread_exit().

This is based on the investigation and proprosed solution by
Srinavasa Nagaraju <srinavasa.x.nagaraju@sonyericsson.com>

Change-Id: I145fb5d57930e91b00f1609d7b2cd16a55d5b3a9
Avoid multiple dns lookups for the same query

If two or more rapid dns requests for the same server are done
from different threads it turns into separate dns reques, if
the response of the request isn't found in the cache.

This patch avoid multiple request for the same server by
letting subsequents request wait until the first request
has finished.

Change-Id: Ic72ea0e7d3964a4164eddf866feb4357ec4dfe54
Added missing cache failed notification

Added a missing call to _resolv_cache_query_failed for another fail
case where it was missing (it doesn't go through the error handling
under the "fail" label). This missing notification caused requests to
have to wait for timeout instead of beeing notified on some failed
requests.

Change-Id: I904d60269c59b926784e3a397d2a860329f55142
Fix race condition in pthread_create()

Save thread id to *thread_out before new
thread is allowed to run else there's a
risk that the thread has finished and
been deleted when *thread_out is assigned.

Change-Id: I6b84c61a8df06840877d4ab036f26feace3192d8
Fix <sys/klog.h> to correspond to the kernel operations.

This makes the constants correspond to those in the Linux kernel's
include/linux/syslog.h, but keeping our old badly-named constants for
source compatibility.

Change-Id: Ia47d1299205754cbfffd29ed48b497b53d1edaae
Add basic KSM support